EP1983349B1 - Dispositif et procede d'estimation de la capacite residuelle d'une pile secondaire - Google Patents

Dispositif et procede d'estimation de la capacite residuelle d'une pile secondaire Download PDF

Info

Publication number
EP1983349B1
EP1983349B1 EP07708362.4A EP07708362A EP1983349B1 EP 1983349 B1 EP1983349 B1 EP 1983349B1 EP 07708362 A EP07708362 A EP 07708362A EP 1983349 B1 EP1983349 B1 EP 1983349B1
Authority
EP
European Patent Office
Prior art keywords
value
secondary battery
estimation
state
charge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
EP07708362.4A
Other languages
German (de)
English (en)
Other versions
EP1983349A1 (fr
EP1983349A4 (fr
Inventor
Yusuke Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of EP1983349A1 publication Critical patent/EP1983349A1/fr
Publication of EP1983349A4 publication Critical patent/EP1983349A4/fr
Application granted granted Critical
Publication of EP1983349B1 publication Critical patent/EP1983349B1/fr
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements

Definitions

  • the present invention relates to a device and method for estimating a remaining amount of a chargeable secondary battery, and particularly to a technique for avoiding excessive charging and excessive discharging of the secondary battery with more stability.
  • the secondary battery which is used in various fields, requires the appropriate charge/discharge control for the efficient operation thereof. This requires the remaining amount of the secondary battery (State of Charge; hereinafter simply referred to as an SOC) to be estimated with high accuracy.
  • SOC State of Charge
  • both of the electromotive voltage (Open Circuit Voltage; hereinafter simply referred to as an OCV) of the battery and the current integrated value are used to estimate the remaining amount of the battery (SOC) (for example, Japanese Patent Laying-Open No. 2003-149307 ).
  • SOC remaining amount of the battery
  • the remaining-amount calculation method for the battery is proposed which is characterized in that an SOC correction parameter is determined by the electromotive voltage of the battery and the correction parameter is used to correct the SOC based on the current integration.
  • the remaining-amount control method is proposed for correcting, depending on the output voltage, a charge efficiency ⁇ used for the remaining-amount estimation based on the current integration (for example, Japanese Patent Laying-Open No. 2002-369391 ).
  • the secondary battery mounted in a hybrid vehicle and the like is subjected to charge/discharge control, based on the estimated SOC, so as to give a higher priority to charging or discharging assuming a control center value of the SOC as a boundary.
  • upper and lower limit values are set in the SOC management range including the control center value to prevent excessive charging and excessive discharging. In other words, while charging is limited or inhibited in the case of exceeding the management upper limit value, discharging is limited or inhibited in the case of falling below the management lower limit value.
  • the SOC correction parameter is set to be larger in the vicinity of the upper and lower limit values in the SOC management range.
  • the correction value is determined such that the estimated SOC, based on the integrated value of the charging/discharging current, approaches the estimated SOC based on the electromotive voltage. Consequently, even if the estimated SOC based on the current integrated value (for example, 85%) approaches the management upper limit value (for example, 90%) as compared to the estimated SOC based on the electromotive voltage (for example, 80%), the estimated SOC based on the current integrated value is largely corrected further downward, that is, to be away from the management upper limit value. In view of avoiding the excessive charging of the secondary battery, the above-described correction produces the opposite effect, which increases the possibility of excessive charging on the contrary.
  • the estimated SOC based on the current integrated value (for example, 15%) is in close proximity to the management lower limit value (for example, 10%) as compare to the estimated SOC based on the electromotive voltage (for example, 20%)
  • the estimated SOC based on the current integrated value is largely corrected further upward, that is, to be away from the management lower limit value, which increases the possibility of excessive discharging on the contrary.
  • the time change rate of the remaining amount of the secondary battery varies depending on the magnitude of the charging/discharging current of the secondary battery. Accordingly, in the case where the remaining amount is in proximity to the management upper limit value, the generation of large charging current may cause excessive charging. In the case where the remaining amount is in proximity to the management lower limit value, the generation of large discharging current may cause excessive discharging.
  • An object of the present invention is to provide a remaining-amount estimation device and method for the secondary battery for estimating the remaining amount of the secondary battery with high accuracy while avoiding excessive charging and excessive discharging with more stability.
  • a remaining-amount estimation device for a chargeable secondary battery includes a first estimation unit calculating a first estimation value for a remaining amount of the secondary battery based on a charging/discharging amount of the secondary battery from a time of a last remaining-amount estimation; a second estimation unit calculating a second estimation value for the remaining amount of the secondary battery based on a state value of the secondary battery; and a correction unit correcting the first estimation value based on a correction value in accordance with a deviation of a last calculated value of the remaining amount from the second estimation value, the last calculated value of the remaining amount being a remaining-amount estimation value of the secondary battery estimated at the time of the last remaining-amount estimation, and generating the remaining-amount estimation value of the secondary battery.
  • the correction unit calculates the correction value based on the magnitude of the last calculated value of the remaining amount and the magnitude relationship between the last calculated value of the remaining amount and the second estimation value.
  • the first estimation value calculated based on the charging/discharging amount of the secondary battery from the time of the last remaining-amount estimation is corrected based on the magnitude of the last calculated value of the remaining amount which is the remaining-amount estimation value of the secondary battery estimated at the time of the last remaining-amount estimation and the magnitude relationship between the last calculated value of the remaining amount and the second estimation value, to thereby calculate the remaining-amount estimation value of the secondary battery.
  • the correction value can be determined based on the range in which the last calculated remaining-amount estimation value of the secondary battery lies (for example, whether or not it is in proximity to excessive charging or excessive discharging), and the direction in which the correction value is generated (for example, in which direction of the excessive charging side or the excessive discharging side the correction value is generated).
  • the remaining-amount estimation value can be calculated so as to indicate the safe side (further excessive charging side or further excessive discharging side) value for the secondary battery in the charge/discharge control.
  • the range other than the above-mentioned range it is possible to enhance the followability to the second estimation value to improve the estimation accuracy of the remaining-amount estimation value.
  • the correction unit includes a deviation calculation unit calculating the deviation receiving the second estimation value and the last calculated value of the remaining amount; a correction value calculation unit calculating the correction value by multiplying the deviation received from the deviation calculation unit by at least one correction gain; and an estimation value calculation unit adding the correction value received from the correction value calculation unit to the first estimation value received from the first estimation unit, for output.
  • the at least one correction gain includes a first correction gain
  • the correction value calculation unit includes a first correction gain selection unit selecting the first correction gain based on the magnitude of the last calculated value of the remaining amount and the magnitude relationship between the last calculated value of the remaining amount and the second estimation value.
  • the first correction gain selection unit on the condition that the last calculated value of the remaining amount is within a first range in proximity to excessive charging of the secondary battery and the second estimation value is not less than a first predetermined value, decreases the first correction gain in the case where the last calculated value of the remaining amount is greater than the second estimation value as compared to the case where the last calculated value of the remaining amount is smaller than the second estimation value; and, on the condition that the last calculated value of the remaining amount is within a second range in proximity to excessive discharging of the secondary battery and the second estimation value is not more than a second predetermined value, decreases the first correction gain in the case where the last calculated value of the remaining amount is smaller than the second estimation value as compared to the case where the last calculated value of the remaining amount is greater than the second estimation value.
  • the first correction gain selection unit selects the first correction gain by referring to a predetermined map in which the last calculated value of the remaining amount and the second estimation value each are defined as an input.
  • the at least one correction gain further includes a second correction gain
  • the correction value calculation unit further includes a second correction gain selection unit selecting the second correction gain based on the relationship between an input/output current of the secondary battery for charging/discharging the secondary battery and the second estimation value.
  • the second correction gain selection unit in the case where the second estimation value is not less than a third predetermined value in proximity to excessive charging of the secondary battery, increases the second correction gain as the input current to the secondary battery increases; and, in the case where the second estimation value is not more than a fourth predetermined value in proximity to excessive discharging of the secondary battery, increases the second correction gain as the output current to the secondary battery increases.
  • the second correction gain selection unit selects the second correction gain by referring to the predetermined map in which the input/output current of the secondary battery and the second estimation value each are defined as an input.
  • a remaining-amount estimation device for a chargeable secondary battery includes a first estimation unit calculating a first estimation value for a remaining amount of the secondary battery based on a charging/discharging amount of the secondary battery from a time of a last remaining-amount estimation; a second estimation unit calculating a second estimation value for the remaining amount of the secondary battery based on a state value of the secondary battery; and a correction unit correcting the first estimation value based on a correction value in accordance with a deviation of a last calculated value of the remaining amount from the second estimation value, the last calculated value of the remaining amount being a remaining-amount estimation value of the secondary battery estimated at the time of the last remaining-amount estimation, and generating the remaining-amount estimation value of the secondary battery.
  • the correction unit calculates the correction value based on the relationship between an input/output current of the secondary battery for charging and discharging the secondary battery and the second estimation value.
  • the first estimation value calculated based on the charging/discharging amount of the secondary battery from the time of the last remaining-amount estimation is corrected based on the relationship between the input/output current of the secondary battery and the second estimation value, to thereby calculate the remaining-amount estimation value of the secondary battery.
  • the correction value can be determined based on the input/output current of the secondary battery corresponding to the range in which the second estimation value lies (for example, whether the input current which is not less than a predetermined value is generated in the range in proximity to excessive charging, or whether the output current which is not less than the predetermined value is generated in the range in proximity to excessive discharging).
  • the second estimation value is in the range in proximity to excessive charging and the input current to the secondary battery is large, and, in the case where the second estimation value is in the range in proximity to excessive discharging and the output current from the secondary battery is large, it is possible to enhance the followability to the second estimation value to improve the estimation accuracy of the remaining-amount estimation value.
  • the correction unit includes a deviation calculation unit calculating the deviation receiving the second estimation value and the last calculated value of the remaining amount; a correction value calculation unit calculating the correction value by multiplying the deviation received from the deviation calculation unit by at least one correction gain; and an estimation value calculation unit adding the correction value received from the correction value calculation unit to the first estimation value received from the first estimation unit, for output.
  • the at least one correction gain includes a first correction gain
  • the correction value calculation unit includes a first correction gain selection unit selecting the first correction gain based on the relationship between the input/output current of the secondary battery and the second estimation value.
  • the first correction gain selection unit in the case where the second estimation value is not less than a first predetermined value in proximity to excessive charging of the secondary battery, increases the first correction gain as the input current to the secondary battery increases; and, in the case where the second estimation value is not more than a second predetermined value in proximity to excessive discharging of the secondary battery, increases the first correction gain as the output current from the secondary battery increases.
  • the first correction gain selection unit selects the first correction gain by referring to a predetermined map in which the input/output current of the secondary battery and the second estimation value each are defined as an input.
  • the at least one correction gain further includes a third correction gain
  • the correction value calculation unit further includes a third correction gain selection unit selecting the third correction gain based on a battery temperature of the secondary battery.
  • the third correction gain selection unit increases the third correction gain as the battery temperature of the secondary battery increases.
  • the first estimation unit obtains the charging/discharging amount of the secondary battery based on an integrated value of the input/output current of the secondary battery.
  • the second estimation unit calculates the second estimation value based on an electromotive voltage of the secondary battery.
  • the remaining-amount estimation device for the secondary battery further includes an electromotive voltage calculation unit calculating the electromotive voltage of the secondary battery based on a charge/discharge voltage of the secondary battery, a polarized voltage of the secondary battery, and a voltage drop caused by an internal resistance of the secondary battery.
  • a remaining-amount estimation method for a chargeable secondary battery includes the steps of calculating a first estimation value for a remaining amount of the secondary battery based on a charging/discharging amount of the secondary battery from a time of a last remaining-amount estimation; calculating a second estimation value for the remaining amount of the secondary battery based on a state value of the secondary battery; and correcting the first estimation value based on a correction value in accordance with a deviation of a last calculated value of the remaining amount from the second estimation value, the last calculated value of the remaining amount being a remaining-amount estimation value of the secondary battery estimated at the time of the last remaining-amount estimation, and generating the remaining-amount estimation value of the secondary battery.
  • the correction value is calculated based on the magnitude of the last calculated value of the remaining amount and the magnitude relationship between the last calculated value of the remaining amount and the second estimation value.
  • a remaining-amount estimation method for a chargeable secondary battery includes the steps of calculating a first estimation value for a remaining amount of the secondary battery based on a charging/discharging amount of the secondary battery from a time of a last remaining-amount estimation; calculating a second estimation value for the remaining amount of the secondary battery based on a state value of the secondary battery; and correcting the first estimation value based on a correction value in accordance with a deviation of a last calculated value of the remaining amount from the second estimation value, the last calculated value of the remaining amount being a remaining-amount estimation value of the secondary battery estimated at the time of the last remaining-amount estimation, and generating the remaining-amount estimation value of the secondary battery.
  • the correction value is calculated based on the relationship between an input/output current of the secondary battery for charging and discharging the secondary battery and the second estimation value.
  • a remaining-amount estimation device and method for the secondary battery can be achieved for estimating the remaining amount of the secondary battery with high accuracy while avoiding excessive charging and excessive discharging with more stability.
  • a vehicle 100 includes a secondary battery 6, a PCU (Power Control Unit) 8, a motor generator (MG) 10, an ECU 1, a voltage measurement unit 12, a current measurement unit 14, and a temperature measurement unit 16.
  • Vehicle 100 is a hybrid vehicle which runs by at least one of the driving force from motor generator 10 and the driving force from the engine which is not shown.
  • the vehicle may be a fuel vehicle incorporating a fuel cell or an electric vehicle which runs only using the driving force from the motor generator.
  • Secondary battery 6 is a battery set having a configuration in which a plurality of battery modules each consisting of a plurality of integrated battery cells are connected in series and, by way of example, includes a lithium ion battery, a nickel metal hydride battery, and the like. Secondary battery 6 is configured to be charged and discharged by means of PCU 8.
  • PCU 8 converts DC (Direct Current) power supplied from secondary battery 6 to AC (Alternating Current) power to supply it to motor generator 10 during the power running of vehicle 100, and converts AC power generated by motor generator 10 to DC power to supply it to secondary battery 6 during the regenerative braking of vehicle 100, to thereby collect kinetic energy of vehicle 100 as electric energy. Furthermore, PCU 8 may include a step-up/down converter (DC/DC converter) for boosting DC power supplied from secondary battery 6 and lowering DC voltage supplied from motor generator 10.
  • DC/DC converter step-up/down converter
  • the regenerative braking described herein includes a braking operation involving dynamic braking in the case of the foot brake operation by the driver of the hybrid vehicle and decelerating (or discontinuation of acceleration) while performing dynamic braking by releasing the accelerator pedal during vehicle running without a foot brake operation.
  • Motor generator 10 which is, for example, a three phase AC rotating electrical machine acts as an electric motor on receiving AC power supplied from PCU 8 and transmits the driving force for driving vehicle 100 to wheels which are not shown. Furthermore, motor generator 10 acts as an electric generator on receiving the rotational driving force transmitted through the wheels and converts the kinetic energy of vehicle 100 to electric power for transferring back to secondary battery 6 by means of PCU 8.
  • ECU 1 performs processing based on the driving state of vehicle 100, the accelerator pedal position, the shift position, the SOC of the secondary battery, the map and program stored in a ROM (Read Only Memory) 3 incorporated in ECU 1, and the like.
  • ECU 1 controls the devices incorporated in the vehicle so as to cause a driving state according to the operation instruction from the driver.
  • Voltage measurement unit 12 measuring a charge/discharge voltage Vb of secondary battery 6
  • current measurement unit 14 measuring an input/output current Ib of secondary battery 6
  • temperature measurement unit 16 measuring a battery temperature Tb of the secondary battery are connected to ECU 1.
  • ECU 1 includes an SOC estimation unit 2 and a charge/discharge control unit 5.
  • SOC estimation unit 2 sequentially estimates the SOC of secondary battery 6 based on charge/discharge voltage Vb of secondary battery 6, input/output current Ib of secondary battery 6 and battery temperature Tb of secondary battery 6 which are measured by voltage measurement unit 12, current measurement unit 14 and temperature measurement unit 16, respectively.
  • the estimated SOC estimation value of secondary battery 6 is stored in a RAM (Random Access Memory) 4 incorporated in ECU 1.
  • charge/discharge control unit 5 supplies a control instruction to PCU 8 to control the charging amount supplied from motor generator 10 to secondary battery 6 and the discharging amount supplied from secondary battery 6 to motor generator 10.
  • Fig. 2 shows an example of charge/discharge control by charge/discharge control unit 5.
  • charge/discharge control unit 5 decreases the charging amount for secondary battery 6 as the SOC estimation value increases. Furthermore, when the SOC estimation value exceeds a state value S4, charge/discharge control unit 5 sets the charging amount to zero. Thus, charge/discharge control unit 5 limits the charging of secondary battery 6 within a charge limited range (state values S3-S4) and inhibits the charging of secondary battery 6 within a charge inhibited range (state value S4-).
  • charge/discharge control unit 5 decreases the discharging amount for secondary battery 6 as the SOC estimation value decreases. Furthermore, when the SOC estimation value falls below a state value S1, charge/discharge control unit 5 sets the discharging amount to zero. Thus, charge/discharge control unit 5 limits the discharging of secondary battery 6 within a discharge limited range (state values S2-S1) and inhibits the discharging of secondary battery 6 within a discharge inhibited range (state value S1-).
  • SOC estimation unit 2 performs processing in a constant cycle (for example, every 100 msec), to calculate the present SOC estimation value based on the SOC estimation value calculated in the previous estimation (one cycle before), charge/discharge voltage Vb, input/output current Ib, and battery temperature Tb.
  • SOC estimation unit 2 includes a provisional SOC calculation unit 30, an electromotive voltage calculation unit 20, an estimated SOC calculation unit 28, and an SOC calculation unit 40.
  • Provisional SOC calculation unit 30 calculates a first estimation value #SOCa for the remaining amount of secondary battery 6 based on the charging/discharging amount of secondary battery 6 from after the last remaining-amount (SOC) estimation is performed. In other words, provisional SOC calculation unit 30 adds or subtracts the variation amount in the charging/discharging amount in secondary battery 6 in the period from the previous estimation to the present, to thereby calculate first estimation value #SOCa. By way of example, provisional SOC calculation unit 30 obtains the charging/discharging amount of secondary battery 6 based on the integrated value of input/output current Ib of secondary battery 6.
  • Provisional SOC calculation unit 30 includes an integrating unit 32 integrating input/output current Ib and an adding unit 34 outputting, as first estimation value #SOCa, the sum of an output value of integrating unit 32 and the last calculated SOC estimation value.
  • First estimation value #SOCa is also referred to as a "provisional SOC" hereinafter.
  • the provisional SOC is an estimation value for the remaining amount of secondary battery 6 based on the charging/discharging amount of secondary battery 6 on the basis of the last calculated remaining-amount estimation value.
  • Electromotive voltage calculation unit 20 calculates the electromotive voltage of secondary battery 6 based on charge/discharge voltage Vb of secondary battery 6, the polarized voltage in secondary battery 6 and the voltage drop caused by the internal resistance of secondary battery 6.
  • Electromotive voltage calculation unit 20 includes a voltage drop calculation unit 22, a polarized voltage calculation unit 24 and an adding unit 26.
  • voltage drop calculation unit 22 calculates a voltage drop occurring in secondary battery 6. For example, variation of the internal resistance is previously stored as a map in which battery temperature Tb is defined as an input (parameter), and this voltage drop is calculated based on the product of the internal resistance obtained by referring to the map and input/output current Ib.
  • Polarized voltage calculation unit 24 calculates the polarized voltage generated in secondary battery 6 based on battery temperature Tb and input/output current Ib. This polarized voltage may also be calculated by referring to the previously stored map in which battery temperature Tb and input/output current Ib each are defined as an input (parameter).
  • Adding unit 26 adds the voltage drop calculated by voltage drop calculation unit 22 to charge/discharge voltage Vb and subtracts the polarized voltage calculated by polarized voltage calculation unit 24 to thereby calculate an estimation value of the electromotive voltage (open circuit voltage) #OCV of secondary battery 6.
  • charge/discharge voltage Vb, input/output current Ib, and battery temperature Tb used in electromotive voltage calculation unit 20 each may be, for example, an average value during the period from the last estimation to the present.
  • Estimated SOC calculation unit 28 calculates a second estimation value #SOCb for the remaining amount of secondary battery 6 based on electromotive voltage #OCV, which is an example of the state value of secondary battery 6, calculated by electromotive voltage calculation unit 20.
  • Second estimation value #SOCb is also referred to as an "estimated SOC" hereinafter.
  • the estimated SOC is an estimation value for the remaining amount of secondary battery 6 based on the state value of secondary battery 6.
  • the configuration (estimated SOC calculation unit 28) in which the estimation value is calculated based on the electromotive voltage of secondary battery 6 is illustrated, but the calculation of the estimated SOC is not limited thereto.
  • the estimated SOC may be calculated based on the battery internal pressure of secondary battery 6.
  • the estimated SOC can be obtained selectively using the state value such as charge/discharge voltage, input/output current, battery temperature, and battery internal pressure of the secondary battery as appropriate depending on the type of the secondary battery.
  • estimated SOC calculation unit 28 obtains a mapped value corresponding to electromotive voltage #OCV of secondary battery 6 by referring to the previously stored map as shown in Fig. 4 to thereby allow the estimated SOC (#SOCb) to be calculated in a range of 0-100 (%).
  • SOC calculation unit 40 receives the provisional SOC (#SOCa) and the estimated SOC (#SOCb) from provisional SOC calculation unit 30 and estimated SOC calculation unit 28, respectively, and corrects the provisional SOC (#SOCa) with the correction value calculated by the predetermined processing, to thereby generate a remaining-amount (SOC) estimation value of secondary battery 6.
  • SOC calculation unit 40 acts as an integrating element (I element) for correcting the provisional SOC (#SOCa) such that it approaches the estimated SOC (#SOCb).
  • SOC calculation unit 40 calculates the correction value based on the magnitude of the SOC estimation value (also hereinafter referred to as an "SOC estimation value (last calculated value)") estimated at the time of the last remaining-amount estimation and the magnitude relationship between the SOC estimation value (last calculated value) and the estimated SOC (#SOCb).
  • SOC calculation unit 40 includes a subtracting unit 42, a correction value calculation unit 50, and an adding unit 52.
  • Correction value calculation unit 50 receives the deviation from subtracting unit 42 and multiplies the deviation by a plurality of correction gains to calculate a correction value.
  • Correction value calculation unit 50 includes a conversion gain unit 44, an SOC-estimation-value-depending gain selection unit 46 and a battery-temperature-depending gain selection unit 48, and sequentially multiplies the deviation by the correction gain in each unit to calculate a correction value.
  • Conversion gain unit 44 has a conversion gain K which is a fixed value and adjusts the deviation such that the scope of the correction value to be output is appropriately set depending on the variable scope of the deviation to be input.
  • SOC-estimation-value-depending gain selection unit 46 selects a correction gain G1 based on the magnitude of the SOC estimation value (last calculated value) and the magnitude relationship between the SOC estimation value (last calculated value) and the estimated SOC (#SOCb).
  • SOC-estimation-value-depending gain selection unit 46 may previously store the map, in which the SOC estimation value (last calculated value) and the estimated SOC each are defined as an input (parameter), to select correction gain G1 by referring to the map.
  • the deviation obtained after the multiplication by conversion gain K in conversion gain unit 44 is further multiplied by its correction gain G1 for output.
  • Battery-temperature-depending gain selection unit 48 selects a correction gain G3 based on battery temperature Tb.
  • battery-temperature-depending gain selection unit 48 may also previously store the map in which battery temperature Tb and the estimated SOC (#SOCb) each are defined as an input (parameter) to select correction gain G3 by referring to the map.
  • the value obtained after the multiplication by correction gain G1 in SOC-estimation-value-depending gain selection unit 46 is further multiplied by its correction gain G3 to output the result as a correction value ⁇ SOC.
  • Adding unit 52 receives correction value ⁇ SOC from battery-temperature-depending gain selection unit 48 and adds correction value ⁇ SOC to provisional SOC (#SOCa) received from provisional SOC calculation unit 30 to output the result as an SOC estimation value.
  • correction gain G1 in SOC-estimation-value-depending gain selection unit 46 will be described below in detail.
  • Fig. 5A shows the case where the SOC estimation value is relatively large (in proximity to excessive charging) and Fig. 5B shows the case where the SOC estimation value is relatively small (in proximity to excessive discharging).
  • SOC-estimation-value-depending gain selection unit 46 calculates a deviation of the SOC estimation value (last calculated value) with respect to the estimated SOC (#SOCb) and multiplies the deviation by the predetermined correction gain to calculate a correction value. Accordingly, if the estimated SOC (#SOCb) ⁇ the SOC estimation value (last calculated value), negative deviation occurs, with the result that a negative correction value is added to the SOC provisional value (#SOCa), and then, the SOC estimation value is continuously corrected so as to approach the estimated SOC (#SOCb) indicating a smaller value.
  • the SOC estimation value is larger than the estimated SOC (#SOCb) while the SOC estimation value indicates a value in proximity to excessive charging, the SOC estimation value is corrected in the opposite direction (low SOC side) to the excessive charging side. Consequently, if an error occurs in the estimated SOC (#SOCb) caused by the measurement accuracy and the like in voltage measurement unit 12, current measurement unit 14 and temperature measurement unit 16, a relatively small SOC estimation value may be calculated while secondary battery 6 is in the excessive charging state.
  • the SOC estimation value is smaller than the estimated SOC (#SOCb) while the SOC estimation value indicates a value in proximity to excessive discharging, the SOC estimation value is corrected in the opposite direction (high SOC side) to the excessive discharging side. Consequently, if an error occurs in the estimated SOC (#SOCb) caused by the measurement accuracy and the like in voltage measurement unit 12, current measurement unit 14 and temperature measurement unit 16, a relatively large SOC estimation value may be calculated while secondary battery 6 is in the excessive discharging state.
  • SOC-estimation-value-depending gain selection unit 46 relatively decreases correction gain G1 to thereby avoid the calculation of the excessive correction value and calculate the SOC estimation value so as to indicate the safe side (toward the excessive charging side or toward the excessive discharging side) value for secondary battery 6 in the charge/discharge control.
  • a map 46# is a two-dimensional map in which the SOC estimation value (last calculated value) and the estimated SOC (#SOCb) each are defined as an input, and the mapped value to be output corresponds to correction gain G1.
  • This correction gain G1 is a correction gain which is multiplied in SOC-estimation-value-depending gain selection unit 46 in Fig. 3 .
  • Map 46# has regions defined by an SOC range r1 in which the SOC estimation value (last calculated value) is in proximity to excessive charging, an SOC range r2 in which the SOC estimation value (last calculated value) is in proximity to excessive discharging, and characteristic lines 60-64.
  • Characteristic line 60 shows the position where the SOC estimation value (last calculated value) matches the estimated SOC (#SOCb).
  • Characteristic lines 61 and 62 each show the position where the estimated SOC (#SOCb) corresponds to a predetermined value.
  • Characteristic line 63 shows the position where the deviation of the SOC estimation value with respect to the estimated SOC (#SOCb) corresponds to -d1.
  • Characteristic line 64 shows the position where the deviation of the SOC estimation value with respect to the estimated SOC (#SOCb) corresponds to d2.
  • a gain value g11 in the case where the SOC estimation value (last calculated value) is greater than the estimated SOC (#SOCb) (above characteristic line 60) is set to a value smaller than a gain value g15 in the case where the SOC estimation value (last calculated value) is smaller than the estimated SOC (#SOCb) (below characteristic line 60).
  • SOC range r1 is selected such that it corresponds to the charge limited range (state values S3-S4) as shown in Fig. 2 .
  • the SOC estimation value (last calculated value) has increased to the charge limited value (state value S3), the correction is performed toward the safe side (correction gain G1 is relatively decreased).
  • the SOC estimation value (last calculated value) increases to the charge inhibited value (state value S4), secondary battery 6 is inhibited from being charged. Consequently, it is desirable to further enhance the followability to improve the estimation accuracy (to reset or relatively increase correction gain G1).
  • the region in which gain value g11 is set in map 46# corresponds to the region above characteristic line 60, and gain value g15 greater than gain value g11 is set in the region below characteristic line 60.
  • map 46# the region having smaller gain value g11 set therein is limited to below characteristic line 61 where the estimated SOC (#SOCb) is not less than the predetermined value.
  • the variation amount of the electromotive voltage relative to the SOC variation is increased as approaching the excessive charging side (relatively large SOC) or excessive discharging side (relatively small SOC) with respect to 50%.
  • the electromotive voltage variation relative to the SOC variation is relatively small (the sensitivity to the SOC variation is low), which causes a relatively large estimation error of the estimated SOC (#SOCb). Therefore, it is desirable to further enhance the followability to improve the estimation accuracy in the above-mentioned region where the estimation error of the estimated SOC (#SOCb) becomes relatively large.
  • map 46# depending on the electromotive voltage characteristic of secondary battery 6, the region in which the measurement error of the estimated SOC (#SOCb) becomes relatively large is defined by characteristic lines 61 and 62.
  • the region in which the measurement error of the SOC is relatively small that is, the region below characteristic line 61 and the region above characteristic line 62, a smaller gain is set.
  • a gain value g12 in the case where the SOC estimation value is smaller than the estimated SOC (#SOCb) (below characteristic line 60) is set to a value smaller than gain value g15 in the case where the SOC estimation value (last calculated value) is greater than the estimated SOC (#SOCb) (above characteristic line 60).
  • SOC range r2 is selected such that it corresponds to the discharge limited range (state values S2-S1) as shown in Fig. 2 .
  • the SOC estimation value (last calculated value) has decreased to the discharge limited value (state value S2)
  • the correction is performed further toward the safe side (the correction gain is relatively decreased).
  • the SOC estimation value (last calculated value) decreases to the discharge inhibited value (state value S1)
  • secondary battery 6 is inhibited from being discharged. Consequently, it is desirable to enhance the followability to improve the estimation accuracy (reset or relatively increase the correction gain).
  • the SOC estimation value (last calculated value) is within SOC range r2 in proximity to the excessive discharging, the above-described correction toward the safe side (relatively decreasing the correction gain) is required, which is the case when the SOC estimation value (last calculated value) is smaller than the estimated SOC (#SOCb).
  • the region in which gain value g12 is set in map 46# corresponds to the region below characteristic line 60, and gain value g15 greater than gain value g12 is set in the region above characteristic line 60.
  • gain values g13 and g14 which are greater than gain value g15 are set for the region having an absolute value of the deviation greater than
  • correction gain G3 in a battery-temperature-depending gain selection unit 48 will be hereinafter described in detail.
  • map 48# is a two-dimensional map in which battery temperature Tb and the estimated SOC (#SOCb) each are defined as an input (parameter), and the mapped value to be output corresponds to correction gain G3.
  • This correction gain G3 is a correction gain which is multiplied in battery-temperature-depending gain selection unit 48 in Fig. 3 .
  • Secondary battery 6 uses chemical reaction to charge and discharge the electric energy (electric charge). This chemical reaction having its activity affected by the battery temperature is further activated as battery temperature Tb rises. Due to this increased activity, an electromotive voltage estimation value #OCV of secondary battery 6 tends to fluctuate, so that the estimated SOC (#SOCb) also relatively greatly fluctuates. Thus, it is desirable to relatively increase correction gain G3 to enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • electromotive voltage estimation value #OCV of secondary battery 6 tends to fluctuate.
  • correction gain G3 it is desirable to relatively increase correction gain G3 to enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • map 48# is set such that correction gain G3 indicating the above-described characteristic is selected.
  • Fig. 8 shows a variation in correction gain G3 related to the estimated SOC (#SOCb) in map 48#. It is to be noted that temperatures T1, T2 and T3 in Fig. 8 correspond to temperatures T1, T2 and T3 (T1 ⁇ T2 ⁇ T3), respectively, shown in map 48# in Fig. 7 .
  • correction gain G3 is set so as to increase as the estimated SOC (#SOCb) is displaced with respect to 50% toward the excessive charging side or excessive discharging side.
  • Battery-temperature-depending gain selection unit 48 sets correction gain G3 on the excessive charging side and the excessive discharging side to be relatively increased, to thereby further improve the estimation accuracy.
  • correction gain G3 corresponding to each estimated SOC (#SOCb) is set to be increased as battery temperature Tb of secondary battery 6 rises.
  • the characteristic line showing correction gain G3 will shift upward in the graph as battery temperature Tb rises.
  • correction gain G3 is increased as battery temperature Tb of secondary battery 6 rises, which allows the SOC estimation value for secondary battery 6 to be calculated with stability and high accuracy while the variation in battery temperature Tb.
  • provisional SOC calculation unit 30 corresponds to the "first estimation unit”
  • estimated SOC calculation unit 28 corresponds to the "second estimation unit”
  • SOC calculation unit 40 corresponds to the "correction unit”
  • electromotive voltage calculation unit 20 corresponds to the "electromotive voltage calculation unit.”
  • Subtracting unit 42 corresponds to the "deviation calculation unit”
  • correction value calculation unit 50 corresponds to the "correction value calculation unit”
  • adding unit 52 corresponds to the "estimation value calculation unit.”
  • SOC-estimation-value-depending gain selection unit 46 corresponds to the "first correction gain selection unit”
  • battery-temperature-depending gain selection unit 48 corresponds to the "third correction gain selection unit”.
  • correction value calculation unit 50 may be configured to include one of SOC-estimation-value-depending gain selection unit 46 and battery-temperature-depending gain selection unit 48.
  • SOC-estimation-value-depending gain selection unit 46 selects relatively small correction gain G1 in the case where the SOC estimation value (last calculated value) lies in the range in proximity to excessive charging and the SOC estimation value (last calculated value) is corrected to a smaller value (toward the SOC control center). Furthermore, SOC-estimation-value-depending gain selection unit 46 selects relatively small correction gain G1 in the case where the SOC estimation value (last calculated value) lies in the range in proximity to excessive discharging and the SOC estimation value (last calculated value) is corrected to a larger value (toward the SOC control center).
  • the remaining-amount estimation value is calculated so as to indicate the safe side (further excessive charging side or further excessive discharging side) value for the secondary battery in charge/discharge control. Consequently, the remaining amount of the secondary battery can be estimated with high accuracy while avoiding excessive charging and excessive discharging with more stability.
  • battery-temperature-depending gain selection unit 48 in accordance with the increase in battery temperature Tb, relatively increases correction gain G3 depending on the estimated SOC (#SOCb) that may fluctuate relatively greatly, to thereby enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • battery-temperature-depending gain selection unit 48 relatively increases correction gain G3 depending on the estimated SOC (#SOCb) that may fluctuate relatively greatly, to thereby enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • the remaining amount of the secondary battery can be estimated with high accuracy while avoiding excessive charging and excessive discharging with more stability.
  • correction value ⁇ SOC is calculated by the correction gains selected based on the SOC estimation value (last calculated value), the estimated SOC (#SOCb) and the battery temperature, respectively.
  • the configuration in which correction value ⁇ SOC is calculated by the correction gains selected based on the input/output current, the estimated SOC (#SOCb) and the battery temperature, respectively, will be described.
  • an SOC estimation unit 2A according to the second embodiment of the present invention is equivalent to SOC estimation unit 2 according to the first embodiment of the present invention shown in Fig. 3 except that it has an SOC calculation unit 40A in place of SOC calculation unit 40, to which SOC calculation unit 40A is equivalent except that it has a correction value calculation unit 50A in place of correction value calculation unit 50, to which correction value calculation unit 50A is equivalent except that it has an input/output-current-depending gain selection unit 47 in place of SOC-estimation-value-depending gain selection unit 46.
  • Input/output-current-depending gain selection unit 47 selects a correction gain G2 based on the relationship between input/output current Ib of secondary battery 6 received from current measurement unit 14 and the estimated SOC (#SOCb) received from estimated SOC calculation unit 28.
  • input/output-current-depending gain selection unit 47 can previously store the map in which input/output current Ib and the estimated SOC (#SOCb) each are defined as an input (parameter) to select correction gain G2 by referring to the map.
  • the deviation obtained after the multiplication by conversion gain K in conversion gain unit 44 is further multiplied by its correction gain G2 for output.
  • correction gain G2 in input/output-current-depending gain selection unit 47 will be hereinafter described in detail.
  • the variation amount of the electromotive voltage relative to the SOC variation is increased as approaching the excessive charging side (relatively large SOC) or excessive discharging side (relatively small SOC) with respect to 50%.
  • the estimated SOC (#SOCb) may greatly fluctuate.
  • the output current (discharging current) from secondary battery 6 is large in the case where secondary battery 6 approaches the excessive discharging state, the estimated SOC (#SOCb) may greatly fluctuate.
  • a map 47# stored in input/output-current-depending gain selection unit 47 is a two-dimensional map in which input/output current Ib of secondary battery 6 and the estimated SOC (#SOCb) each are defined as an input (parameter), and the mapped value to be output corresponds to correction gain G2.
  • This correction gain G2 is a correction gain which is multiplied in input/output-current-depending gain selection unit 47 in Fig. 9 .
  • correction gain G2 to be output is set to be increased as the input current to secondary battery 6 increases.
  • correction gain G2 to be output is set to be increased as the output current to secondary battery 6 increases.
  • gain values g22 and g23 are set, respectively, which are greater than a gain value g21 set in the other region.
  • Characteristic lines 67 and 68 are determined as appropriate depending on a full charge capacity (Ah) of secondary battery 6, an input/output current value (A), an electromotive voltage characteristic relative to the SOC, and the like.
  • map 47# the regions of gain values g21 and g22 are further subdivided for setting each gain value and correction gain G2 to be output is set to be increased as the input current or output current increases.
  • Figs. 11A and 11B are diagrams for describing gain characteristics 70-74 corresponding to each estimated SOC (#SOCb) in map 47# shown in Fig. 10 .
  • Reference characters 70-74 in Figs. 11A and 11B correspond to reference characters 70-74 in Fig. 10 , respectively.
  • Fig. 11A shows the case where the estimated SOC (#SOCb) is relatively large (in proximity to excessive charging) and Fig. 11B shows the case where the estimated SOC (#SOCb) is relatively small (in proximity to excessive discharging).
  • gain value g21 which is a fixed value is selected independently of input/output current Ib.
  • correction gain G2 starts to increase when input/output current Ib exceeds a predetermined input current value 11.
  • correction gain G2 starts to increase when input/output current Ib exceeds an input current value I2 smaller than input current value I1.
  • correction gain G2 to be output is set to be increased as the input current (charging current) increases and the estimated SOC (#SOCb) increases.
  • correction gain G2 starts to increase when input/output current Ib exceeds a predetermined output current value I3.
  • correction gain G2 starts to increase when input/output current Ib exceeds an output current value I4 smaller than output current value I3.
  • correction gain G2 to be output is set to be increased as the output current (discharging current) increases and/or the estimated SOC (#SOCb) decreases.
  • correction gain G2 is set to be increased for the input current causing secondary battery 6 to be excessively charged or the output current causing secondary battery 6 to be excessively discharged, which allows the SOC estimation value for secondary battery 6 to be calculated with stability and high accuracy.
  • provisional SOC calculation unit 30 corresponds to the "first estimation unit”
  • estimated SOC calculation unit 28 corresponds to the "second estimation unit”
  • SOC calculation unit 40A corresponds to the "correction unit”
  • electromotive voltage calculation unit 20 corresponds to the "electromotive voltage calculation unit.”
  • Subtracting unit 42 corresponds to the "deviation calculation unit”
  • correction value calculation unit 50A corresponds to the "correction value calculation unit”
  • adding unit 52 corresponds to the "estimation value calculation unit.”
  • input/output-current-depending gain selection unit 47 corresponds to the "first correction gain selection unit”
  • battery-temperature-depending gain selection unit 48 corresponds to the "third correction gain selection unit”.
  • correction value calculation unit 50A may be configured to include one of input/output-current-depending gain selection unit 47 and battery-temperature-depending gain selection unit 48.
  • correction value ⁇ SOC is calculated by multiplying one of correction gain G2 selected by input/output-current-depending gain selection unit 47 and correction gain G3 selected by battery-temperature-depending gain selection unit 48, the remaining amount of the secondary battery can be estimated with high accuracy while avoiding excessive charging and excessive discharging with stability.
  • input/output-current-depending gain selection unit 47 in the state where the estimated SOC (#SOCb) may greatly fluctuate such as in the case of being in proximity to excessive charging and of the input current (charging current) being large, or, in the case of being in proximity to excessive discharging and of the output current (discharging current) being large, input/output-current-depending gain selection unit 47 relatively increases correction gain G2 to enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • the remaining amount of the secondary battery can be estimated with high accuracy while avoiding excessive charging and excessive discharging with more stability.
  • battery-temperature-depending gain selection unit 48 in accordance with the increase in battery temperature Tb, relatively increases correction gain G3 depending on the estimated SOC (#SOCb) that may fluctuate relatively greatly, to thereby enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • battery-temperature-depending gain selection unit 48 relatively increases correction gain G3 depending on the estimated SOC (#SOCb) that may fluctuate relatively greatly, to thereby enhance the followability and improve the estimation accuracy of the remaining-amount estimation value.
  • the remaining amount of the secondary battery can be estimated with high accuracy while avoiding excessive charging and excessive discharging with more stability.
  • the configuration in which the correction value is calculated by the correction gains selected based on the SOC estimation value (last calculated value), the estimated SOC (#SOCb) and the battery temperature, and the configuration in which the correction value is calculated by the correction gains selected based on the input/output current, the estimated SOC (#SOCb) and the battery temperature have been described, respectively.
  • the configuration in which the correction value is calculated by all the above correction gains will be described.
  • an SOC estimation unit 2B according to the third embodiment of the present invention is equivalent to SOC estimation unit 2 according to the first embodiment of the present invention shown in Fig. 3 except that it has an SOC calculation unit 40B in place of SOC calculation unit 40, to which SOC calculation unit 40B is equivalent except that it has a correction value calculation unit 50B in place of correction value calculation unit 50.
  • correction value calculation unit 50B is equivalent to correction value calculation unit 50 except that it further includes input/output-current-depending gain selection unit 47 shown in Fig. 9 .
  • SOC-estimation-value-depending gain selection unit 46, input/output-current-depending gain selection unit 47, and battery-temperature-depending gain selection unit 48 each select a correction gain so as to estimate the remaining amount of the secondary battery with high accuracy while avoiding excessive charging and excessive discharging with stability. Therefore, SOC calculation unit 40B can calculate the SOC estimation value obtained by estimating the remaining amount of the secondary battery with higher accuracy while avoiding excessive charging and excessive discharging with more stability, as compared to the first and second embodiments.
  • provisional SOC calculation unit 30 corresponds to the "first estimation unit”
  • estimated SOC calculation unit 28 corresponds to the "second estimation unit”
  • SOC calculation unit 40B corresponds to the "correction unit”
  • electromotive voltage calculation unit 20 corresponds to the "electromotive voltage calculation unit.”
  • Subtracting unit 42 corresponds to the "deviation calculation unit”
  • correction value calculation unit 50B corresponds to the "correction value calculation unit”
  • adding unit 52 corresponds to the "estimation value calculation unit.”
  • SOC-estimation-value-depending gain selection unit 46 corresponds to the "first correction gain selection unit”
  • input/output-current-depending gain selection unit 47 corresponds to the "second correction gain selection unit”
  • battery-temperature-depending gain selection unit 48 corresponds to the "third correction gain selection unit”.
  • the present invention is applicable to any device and system for the secondary battery configured to be charged and discharged based on the SOC estimation value.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Claims (18)

  1. Dispositif d'estimation d'état de charge (100) pour une batterie secondaire rechargeable (6), comprenant :
    une première unité d'estimation (30) qui calcule une première valeur d'estimation pour un état de charge de ladite batterie secondaire (6) sur la base d'une quantité de charge/décharge de ladite batterie secondaire à partir du moment d'une dernière estimation d'état de charge ;
    une deuxième unité d'estimation (20) qui calcule une deuxième valeur d'estimation pour l'état de charge de ladite batterie secondaire (6) sur la base d'une valeur d'état de ladite batterie secondaire (6) ;
    caractérisé par
    une unité de correction (40, 40B) qui corrige ladite première valeur d'estimation sur la base d'une valeur de correction conformément à un écart entre une dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation, la dernière valeur calculée de l'état de charge étant une valeur d'estimation d'état de charge de ladite batterie secondaire estimée au moment de la dernière estimation d'état de charge, et qui génère la valeur d'estimation d'état de charge de ladite batterie secondaire (6),
    ladite unité de correction (40, 40B) calculant ladite valeur de correction sur la base d'une amplitude de ladite dernière valeur calculée de l'état de charge et d'une relation d'amplitude entre ladite dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation.
  2. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 1, dans lequel ladite unité de correction (40, 40B) comporte
    une unité de calcul d'écart (42) qui calcule ledit écart en recevant ladite deuxième valeur d'estimation et ladite dernière valeur calculée de l'état de charge,
    une unité de calcul de valeur de correction (50, 50B) qui calcule la valeur de correction en multipliant ledit écart reçu à partir de ladite unité de calcul d'écart (42) par au moins un gain de correction, et
    une unité de calcul de valeur d'estimation (52) qui ajoute ladite valeur de correction reçue à partir de ladite unité de calcul de valeur de correction (50, 50B) à ladite première valeur d'estimation reçue à partir de ladite première unité d'estimation, pour la sortie,
    ledit au moins un gain de correction comportant un premier gain de correction, et
    ladite unité de calcul de valeur de correction (50, 50B) comportant une unité de sélection de premier gain de correction (46) qui sélectionne ledit premier gain de correction sur la base de l'amplitude de ladite dernière valeur calculée de l'état de charge et de la relation d'amplitude entre ladite dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation.
  3. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 2, dans lequel ladite unité de sélection de premier gain de correction (46),
    diminue ledit premier gain de correction dans un cas où ladite dernière valeur calculée de l'état de charge est supérieure à ladite deuxième valeur d'estimation par rapport à un cas où ladite dernière valeur calculée de l'état de charge est inférieure à ladite deuxième valeur d'estimation, à condition que ladite dernière valeur calculée de l'état de charge soit dans une première plage proche d'une charge excessive de ladite batterie secondaire et ladite deuxième valeur d'estimation ne soit pas inférieure à une première valeur prédéterminée, et,
    diminue ledit premier gain de correction dans un cas où ladite dernière valeur calculée de l'état de charge est inférieure à ladite deuxième valeur d'estimation par rapport à un cas où ladite dernière valeur calculée de l'état de charge est supérieure à ladite deuxième valeur d'estimation, à condition que ladite dernière valeur calculée de l'état de charge soit dans une deuxième plage proche d'une décharge excessive de ladite batterie secondaire et ladite deuxième valeur d'estimation ne soit pas inférieure à une deuxième valeur prédéterminée.
  4. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 2, dans lequel ladite unité de sélection de premier gain de correction (46) sélectionne ledit premier gain de correction en se référant à une carte prédéterminée (46#) où chacune de ladite dernière valeur calculée de l'état de charge et de ladite deuxième valeur d'estimation est définie en tant qu'entrée.
  5. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 2, dans lequel ledit au moins un gain de correction comporte en outre un deuxième gain de correction, et
    ladite unité de calcul de valeur de correction (50, 50B) comporte en outre une unité de sélection de deuxième gain de correction (47) qui sélectionne ledit deuxième gain de correction sur la base d'une relation entre un courant d'entrée/de sortie de ladite batterie secondaire (6) pour charger/décharger ladite batterie secondaire et ladite deuxième valeur d'estimation.
  6. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 5, dans lequel ladite unité de sélection de deuxième gain de correction (47),
    augmente ledit deuxième gain de correction à mesure que le courant d'entrée à ladite batterie secondaire (6) augmente, dans un cas où ladite deuxième valeur d'estimation n'est pas inférieure à une troisième valeur prédéterminée proche d'une charge excessive de ladite batterie secondaire (6) ; et,
    augmente ledit deuxième gain de correction à mesure que le courant de sortie à partir de ladite batterie secondaire augmente, dans un cas où ladite deuxième valeur d'estimation n'est pas supérieure à une quatrième valeur prédéterminée proche d'une décharge excessive de ladite batterie secondaire.
  7. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 5, dans lequel ladite unité de sélection de deuxième gain de correction (47) sélectionne ledit deuxième gain de correction en se référant à la carte prédéterminée (47#) où chacun(e) du courant d'entrée/de sortie de ladite batterie secondaire et de ladite deuxième valeur d'estimation est défini(e) en tant qu'entrée.
  8. Dispositif d'estimation d'état de charge (100) pour une batterie secondaire rechargeable (6), comprenant :
    une première unité d'estimation (30) qui calcule une première valeur d'estimation pour un état de charge de ladite batterie secondaire (6) sur la base d'une quantité de charge/décharge de ladite batterie secondaire (6) à partir du moment d'une dernière estimation d'état de charge ;
    une deuxième unité d'estimation (28) qui calcule une deuxième valeur d'estimation pour l'état de charge de ladite batterie secondaire (6) sur la base d'une valeur d'état de ladite batterie secondaire (6) ;
    caractérisé par
    une unité de correction (40A, 40B) qui corrige ladite première valeur d'estimation sur la base d'une valeur de correction conformément à un écart entre une dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation, la dernière valeur calculée de l'état de charge étant une valeur d'estimation d'état de charge de ladite batterie secondaire estimée au moment de la dernière estimation d'état de charge, et qui génère la valeur d'estimation d'état de charge de ladite batterie secondaire,
    ladite unité de correction (40A, 40B) calculant ladite valeur de correction sur la base d'une relation entre un courant d'entrée/de sortie de ladite batterie secondaire pour charger et décharger ladite batterie secondaire et ladite deuxième valeur d'estimation.
  9. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 8, dans lequel ladite unité de correction (40A, 40B) comporte
    une unité de calcul d'écart (42) qui calcule ledit écart en recevant ladite deuxième valeur d'estimation et ladite dernière valeur calculée de l'état de charge,
    une unité de calcul de valeur de correction (50A, 50B) qui calcule la valeur de correction en multipliant ledit écart reçu à partir de ladite unité de calcul d'écart (42) par au moins un gain de correction, et
    une unité de calcul de valeur d'estimation (52) qui ajoute ladite valeur de correction reçue à partir de ladite unité de calcul de valeur de correction (50A, 50B) à ladite première valeur d'estimation reçue à partir de ladite première unité d'estimation, pour la sortie,
    ledit au moins un gain de correction comportant un premier gain de correction, et
    ladite unité de calcul de valeur de correction (50A, 50B) comportant une unité de sélection de premier gain de correction (46) qui sélectionne ledit premier gain de correction sur la base de la relation entre le courant d'entrée/de sortie de ladite batterie secondaire (6) et ladite deuxième valeur d'estimation.
  10. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 9, dans lequel ladite unité de sélection de premier gain de correction (46) augmente ledit premier gain de correction à mesure que le courant d'entrée à ladite batterie secondaire (6) augmente, dans un cas où ladite deuxième valeur d'estimation n'est pas inférieure à une première valeur prédéterminée proche d'une charge excessive de ladite batterie secondaire (6) ; et augmente ledit premier gain de correction à mesure que le courant de sortie à partir de ladite batterie secondaire (6) augmente, dans un cas où ladite deuxième valeur d'estimation n'est pas supérieure à une deuxième valeur prédéterminée proche d'une décharge excessive de ladite batterie secondaire (6).
  11. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 9, dans lequel ladite unité de sélection de premier gain de correction (46) sélectionne ledit premier gain de correction en se référant à une carte prédéterminée (46#) où chacun(e) du courant d'entrée/de sortie de ladite batterie secondaire et de ladite deuxième valeur d'estimation est défini(e) en tant qu'entrée.
  12. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 2 ou 9, dans lequel ledit au moins un gain de correction comporte en outre un troisième gain de correction, et
    ladite unité de calcul de valeur de correction (50A, 50B) comporte en outre une unité de sélection de troisième gain de correction (48) qui sélectionne ledit troisième gain de correction sur la base d'une température de batterie de ladite batterie secondaire (6).
  13. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 12, dans lequel ladite unité de sélection de troisième gain de correction (48) augmente ledit troisième gain de correction à mesure que la température de batterie de ladite batterie secondaire (6) augmente.
  14. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 1 ou 8, dans lequel ladite première unité d'estimation (30) obtient la quantité de charge/décharge de ladite batterie secondaire (6) sur la base d'une valeur intégrée du courant d'entrée/de sortie de ladite batterie secondaire (6).
  15. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 1 ou 8, dans lequel ladite deuxième unité d'estimation (28) calcule ladite deuxième valeur d'estimation sur la base d'une tension électromotrice de ladite batterie secondaire.
  16. Dispositif d'estimation d'état de charge (100) pour la batterie secondaire (6) selon la revendication 15, comportant en outre une unité de calcul de tension électromotrice (120) qui calcule la tension électromotrice de ladite batterie secondaire sur la base d'une tension de charge/décharge de ladite batterie secondaire, d'une tension polarisée de ladite batterie secondaire, et d'une chute de tension provoquée par une résistance interne de ladite batterie secondaire.
  17. Procédé d'estimation d'état de charge pour une batterie secondaire chargeable (6), comprenant les étapes qui consistent :
    à calculer une première valeur d'estimation pour un état de charge de ladite batterie secondaire (6) sur la base d'une quantité de charge/décharge de ladite batterie secondaire (6) à partir du moment d'une dernière estimation d'état de charge ;
    à calculer une deuxième valeur d'estimation de l'état de charge de ladite batterie secondaire (6) sur la base d'une valeur d'état de ladite batterie secondaire (6) ; et
    à corriger ladite première valeur d'estimation sur la base d'une valeur de correction conformément à un écart entre une dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation, la dernière valeur calculée de l'état de charge étant une valeur d'estimation d'état de charge de ladite batterie secondaire (6) estimée au moment de la dernière estimation de l'état de charge, et à générer la valeur d'estimation d'état de charge de ladite batterie secondaire,
    dans la génération de la valeur d'estimation d'état de charge de ladite batterie secondaire (6), ladite valeur de correction étant calculée sur la base d'une amplitude de ladite dernière valeur calculée de l'état de charge et d'une relation d'amplitude entre ladite dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation.
  18. Procédé d'estimation d'état de charge pour une batterie secondaire chargeable (6), comprenant les étapes qui consistent :
    à calculer une première valeur d'estimation pour un état de charge de ladite batterie secondaire (6) sur la base d'une quantité de charge/décharge de ladite batterie secondaire (6) à partir du moment d'une dernière estimation d'état de charge ;
    à calculer une deuxième valeur d'estimation pour l'état de charge de ladite batterie secondaire (6) sur la base d'une valeur d'état de ladite batterie secondaire ; et
    à corriger ladite première valeur d'estimation sur la base d'une valeur de correction conformément à un écart entre une dernière valeur calculée de l'état de charge et ladite deuxième valeur d'estimation, la dernière valeur calculée de l'état de charge étant une valeur d'estimation d'état de charge de ladite batterie secondaire (6) estimée au moment de la dernière estimation d'état de charge, et à générer la valeur d'estimation d'état de charge de ladite batterie secondaire,
    dans la génération de la valeur d'estimation d'état de charge de ladite batterie secondaire (6), ladite valeur de correction étant calculée sur la base d'une relation entre un courant d'entrée/de sortie de ladite batterie secondaire (6) pour charger et décharger ladite batterie secondaire et ladite deuxième valeur d'estimation.
EP07708362.4A 2006-02-09 2007-02-07 Dispositif et procede d'estimation de la capacite residuelle d'une pile secondaire Expired - Fee Related EP1983349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006032679A JP4967362B2 (ja) 2006-02-09 2006-02-09 二次電池の残存容量推定装置
PCT/JP2007/052550 WO2007091722A1 (fr) 2006-02-09 2007-02-07 Dispositif et procede d'estimation de la capacite residuelle d'une pile secondaire

Publications (3)

Publication Number Publication Date
EP1983349A1 EP1983349A1 (fr) 2008-10-22
EP1983349A4 EP1983349A4 (fr) 2012-11-14
EP1983349B1 true EP1983349B1 (fr) 2013-12-25

Family

ID=38345308

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07708362.4A Expired - Fee Related EP1983349B1 (fr) 2006-02-09 2007-02-07 Dispositif et procede d'estimation de la capacite residuelle d'une pile secondaire

Country Status (6)

Country Link
US (1) US8102146B2 (fr)
EP (1) EP1983349B1 (fr)
JP (1) JP4967362B2 (fr)
KR (1) KR101006214B1 (fr)
CN (1) CN101379409B (fr)
WO (1) WO2007091722A1 (fr)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4640391B2 (ja) * 2007-08-10 2011-03-02 トヨタ自動車株式会社 電源システムおよびそれを備えた車両
JP4893653B2 (ja) * 2008-02-19 2012-03-07 トヨタ自動車株式会社 車両、二次電池の充電状態推定方法および車両の制御方法
JP4978662B2 (ja) * 2009-06-24 2012-07-18 トヨタ自動車株式会社 充電状態推定装置および充電状態推定方法
US8495423B2 (en) * 2009-08-11 2013-07-23 International Business Machines Corporation Flash-based memory system with robust backup and restart features and removable modules
DE102009049589A1 (de) * 2009-10-16 2011-04-21 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Bestimmung und/oder Vorhersage der maximalen Leistungsfähigkeit einer Batterie
EP2495576B1 (fr) * 2009-10-30 2018-10-24 NGK Insulators, Ltd. Procédé de contrôle de pile secondaire et dispositif de stockage d'énergie
JP5379672B2 (ja) * 2009-12-25 2013-12-25 プライムアースＥｖエナジー株式会社 二次電池の分極電圧演算装置及び充電状態推定装置
WO2011132583A1 (fr) * 2010-04-19 2011-10-27 日産自動車株式会社 Dispositif de fourniture d'informations et procédé de fourniture d'informations
JP5771909B2 (ja) * 2010-06-08 2015-09-02 日産自動車株式会社 二次電池の充電容量推定装置
JP5723589B2 (ja) * 2010-09-30 2015-05-27 本田技研工業株式会社 前後輪駆動車両
KR101191624B1 (ko) * 2010-10-13 2012-10-17 삼성에스디아이 주식회사 배터리 관리 시스템 및 이를 이용한 배터리 ｓｏｃ 추정 방법
JP2012143018A (ja) * 2010-12-28 2012-07-26 Kawasaki Heavy Ind Ltd 系統安定化装置および系統安定化方法
JP5741153B2 (ja) * 2011-04-06 2015-07-01 トヨタ自動車株式会社 充電制御装置
US9293937B2 (en) * 2011-04-18 2016-03-22 Hitachi Automotive Systems, Ltd. Electric storage device
FR2974921B1 (fr) * 2011-05-05 2015-07-17 Renault Sas Procede de traitement d'un signal quantifiant l'etat de charge d'une batterie electrique d'un vehicule automobile en fonction du temps
CN103813928A (zh) * 2011-09-26 2014-05-21 丰田自动车株式会社 电池的处理装置、车辆、电池的处理方法及电池的处理程序
JPWO2013046250A1 (ja) * 2011-09-26 2015-03-26 トヨタ自動車株式会社 バッテリの処理装置、車両、バッテリの処理方法及びバッテリの処理プログラム
JP5595361B2 (ja) * 2011-09-27 2014-09-24 プライムアースＥｖエナジー株式会社 二次電池の充電状態推定装置
JP2013083612A (ja) * 2011-10-12 2013-05-09 Mitsumi Electric Co Ltd 電池状態計測方法及び電池状態計測装置
JP2013126258A (ja) * 2011-12-13 2013-06-24 Denso Corp ２次電池の充電率相当量算出装置
JP2013182779A (ja) * 2012-03-01 2013-09-12 Toyota Industries Corp 電池の状態制御方法及び装置
JP6040724B2 (ja) * 2012-03-13 2016-12-07 日産自動車株式会社 バッテリの残存容量算出装置及びバッテリの残存容量算出方法
CN103487755B (zh) * 2012-06-08 2016-02-17 通用电气公司 用于预测电池功率传输性能的系统和方法
JP5835136B2 (ja) * 2012-07-17 2015-12-24 株式会社デンソー 車載充電制御装置
JP5831381B2 (ja) * 2012-07-19 2015-12-09 株式会社デンソー 車載充電制御装置
CN103576095B (zh) * 2012-08-02 2016-06-22 同济大学 一种燃料电池内部性能实时检测系统及方法
KR101547006B1 (ko) * 2012-10-26 2015-08-24 주식회사 엘지화학 배터리 잔존 용량 추정 장치 및 방법
CN103018680B (zh) * 2012-12-11 2014-07-16 矽力杰半导体技术(杭州)有限公司 一种电池电量计量方法、计量装置以及电池供电设备
JP5637339B1 (ja) * 2012-12-26 2014-12-10 三菱自動車工業株式会社 電動車両を用いた電力供給装置
CN104007390B (zh) * 2013-02-24 2018-03-20 快捷半导体(苏州)有限公司 电池电荷状态跟踪、等效电路选择及基准测试方法及系统
US20140244193A1 (en) 2013-02-24 2014-08-28 Fairchild Semiconductor Corporation Battery state of charge tracking, equivalent circuit selection and benchmarking
JP6063337B2 (ja) * 2013-04-25 2017-01-18 京セラ株式会社 電力制御装置、電力制御方法、及び電力制御システム
US9770997B2 (en) * 2013-06-11 2017-09-26 Ford Global Technologies, Llc Detection of imbalance across multiple battery cells measured by the same voltage sensor
CN104241713B (zh) * 2013-06-18 2017-02-01 北汽福田汽车股份有限公司 动力电池的荷电状态soc修正方法及装置
CN103630726B (zh) * 2013-10-30 2017-01-25 惠州市亿能电子有限公司 一种bms休眠模式下电池极化电压的估算方法
JP6421411B2 (ja) * 2013-11-29 2018-11-14 富士通株式会社 電池の充電率を推定する推定プログラム、電池の充電率を推定する推定方法、および、電池の充電率を推定する推定装置
KR101558363B1 (ko) * 2013-12-12 2015-10-07 현대자동차 주식회사 배터리의 충방전 제어 방법 및 시스템
KR101558705B1 (ko) * 2013-12-26 2015-10-07 현대자동차주식회사 배터리 충전 제어 장치 및 방법
JP2015155859A (ja) * 2014-02-21 2015-08-27 ソニー株式会社 電池残量推定装置、電池パック、蓄電装置、電動車両および電池残量推定方法
CN105574304A (zh) * 2014-10-07 2016-05-11 深圳市沃特玛电池有限公司 磷酸铁锂动力电池组soc的估算方法
CN104535933B (zh) * 2014-12-26 2017-08-29 湖南金杯新能源发展有限公司 电池剩余电量测量方法与系统
US20170274794A1 (en) * 2015-02-13 2017-09-28 Panasonic Intellectual Property Management Co., Ltd. Cell status estimation device and power supply device
JP6325497B2 (ja) 2015-09-10 2018-05-16 ファナック株式会社 バッテリー残量を報知する機能を有する電子機器
CN105676141B (zh) * 2016-01-27 2018-06-19 浙江大学 一种基于阻尼振荡的电池容量在线测量系统及其测量方法
CN110506216B (zh) * 2017-03-31 2022-03-08 三菱电机株式会社 蓄电池状态推定装置
JP6834757B2 (ja) * 2017-04-28 2021-02-24 トヨタ自動車株式会社 電池システム
EP3647802B1 (fr) 2017-06-29 2023-11-01 Kabushiki Kaisha Toshiba Dispositif d'estimation de l'énergie restante de la batterie, méthode d'estimation de l'énergie restante de la batterie et programme
CN110596596A (zh) * 2019-10-12 2019-12-20 深圳中科新能源汽车技术有限公司 一种新型的基于ocv曲线的soc逐次校正方法
JP7226299B2 (ja) * 2019-12-23 2023-02-21 トヨタ自動車株式会社 燃料電池車両
CN111796185B (zh) * 2020-06-16 2022-11-08 合肥力高动力科技有限公司 基于t-s型模糊算法的磷酸铁锂电池soc-ocv校准方法
CN117293979B (zh) * 2023-11-27 2024-03-22 广汽埃安新能源汽车股份有限公司 电池均衡控制方法、存储介质和电子设备

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW300957B (fr) * 1994-11-21 1997-03-21 Seiko Epson Corp
JP3178315B2 (ja) * 1994-11-21 2001-06-18 セイコーエプソン株式会社 バッテリ残存容量計及び残存容量算出方法
KR100425352B1 (ko) 1998-05-28 2004-03-31 도요다 지도샤 가부시끼가이샤 전지 충전상태의 추정장치 및 전지 열화상태의 추정방법
JP4012644B2 (ja) 1999-03-12 2007-11-21 トヨタ自動車株式会社 バッテリの充電状態検出装置
JP4186092B2 (ja) * 1999-08-18 2008-11-26 ソニー株式会社 バッテリー機器及びバッテリーの管理方法
DE10002473A1 (de) * 2000-01-21 2001-07-26 Vb Autobatterie Gmbh Verfahren zur Bestimmung des Ladezusatandes von Akkumulatoren
DE10116593B4 (de) * 2001-04-03 2005-05-25 Arvinmeritor Gmbh Fahrzeugdach
JP4523738B2 (ja) 2001-06-07 2010-08-11 パナソニック株式会社 二次電池の残存容量制御方法および装置
JP2003068370A (ja) 2001-08-28 2003-03-07 Toyota Motor Corp バッテリの充電状態検出装置
US6845332B2 (en) * 2001-11-16 2005-01-18 Toyota Jidosha Kabushiki Kaisha State of charge calculation device and state of charge calculation method
JP3778060B2 (ja) 2001-11-16 2006-05-24 トヨタ自動車株式会社 電池残存容量算出方法
JP4032934B2 (ja) * 2002-11-15 2008-01-16 ソニー株式会社 電池容量算出方法、電池容量算出装置、及び電池容量算出プログラム
JP4010288B2 (ja) 2003-07-29 2007-11-21 ソニー株式会社 二次電池の残容量算出方法およびバッテリパック
JP4075762B2 (ja) * 2003-10-10 2008-04-16 トヨタ自動車株式会社 二次電池における残存容量の算出装置および算出方法
WO2005093446A1 (fr) * 2004-03-25 2005-10-06 Nec Lamilion Energy, Ltd. Méthode et équipement d'estimation de la capacité résiduelle d'une batterie de stockage
JP4615439B2 (ja) * 2005-12-28 2011-01-19 株式会社Ｎｔｔファシリティーズ 二次電池管理装置、二次電池管理方法及びプログラム
JP2008136278A (ja) * 2006-11-27 2008-06-12 Matsushita Electric Works Ltd 充電器
JP4893653B2 (ja) * 2008-02-19 2012-03-07 トヨタ自動車株式会社 車両、二次電池の充電状態推定方法および車両の制御方法

Also Published As

Publication number Publication date
CN101379409B (zh) 2011-07-20
US20090024338A1 (en) 2009-01-22
JP2007212298A (ja) 2007-08-23
JP4967362B2 (ja) 2012-07-04
WO2007091722A1 (fr) 2007-08-16
KR101006214B1 (ko) 2011-01-07
EP1983349A1 (fr) 2008-10-22
CN101379409A (zh) 2009-03-04
KR20080097447A (ko) 2008-11-05
EP1983349A4 (fr) 2012-11-14
US8102146B2 (en) 2012-01-24

Similar Documents

Publication Publication Date Title
EP1983349B1 (fr) Dispositif et procede d'estimation de la capacite residuelle d'une pile secondaire
JP6822300B2 (ja) 充電率推定方法および車載の電池システム
KR101135656B1 (ko) 전원시스템 및 그것을 구비한 차량 및 충방전 제어방법
EP1526627B1 (fr) Dispositif de commande pour mechanisme d'accumulation d'électricité
US9475480B2 (en) Battery charge/discharge control device and hybrid vehicle using the same
JP5009223B2 (ja) 二次電池の残存容量推定方法及び装置
US11196103B2 (en) Secondary battery system and method for controlling secondary battery
CN105633437B (zh) 燃料电池系统、燃料电池车辆及燃料电池系统的控制方法
JP6834757B2 (ja) 電池システム
CN111216570B (zh) 燃料电池车辆
WO2005100075A1 (fr) Systeme d'entrainement et procede de commande de ce systeme
US11884180B2 (en) Battery system and method of controlling battery system
JP5989320B2 (ja) 車両用制御装置および残容量推定方法
JP5108076B2 (ja) 車両充電装置
JP2012173250A (ja) 電気自動車のバッテリ充電状態表示装置および電気自動車の制御装置
JP5092903B2 (ja) 車両用電池の充放電制御装置
JP4874646B2 (ja) 電池用制御装置、電動車両、及び二次電池の制御方法
JP2005227164A (ja) 二次電池の残存容量算出装置
JP2006025538A (ja) 二次電池の残存容量推定方法、その残存容量推定方法をコンピュータに実行させるプログラムを記録した記録媒体および電池制御システム
US9580067B2 (en) Charging/discharging control system for electricity storage device
JP4680949B2 (ja) 電動車両の制御装置
JP6627669B2 (ja) 電池システム
JP2022176630A (ja) 電気自動車
JP2022141013A (ja) 電池システムおよびバッテリの電圧推定方法
JP2015080345A (ja) 蓄電池の充放電制御装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20080730

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR

RBV Designated contracting states (corrected)

Designated state(s): DE FR

DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20121011

RIC1 Information provided on ipc code assigned before grant

Ipc: G01R 31/36 20060101AFI20121005BHEP

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: TOYOTA JIDOSHA KABUSHIKI KAISHA

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130716

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602007034423

Country of ref document: DE

Effective date: 20140213

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007034423

Country of ref document: DE

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 602007034423

Country of ref document: DE

26N No opposition filed

Effective date: 20140926

REG Reference to a national code

Ref country code: DE

Ref legal event code: R084

Ref document number: 602007034423

Country of ref document: DE

Effective date: 20141117

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602007034423

Country of ref document: DE

Effective date: 20140926

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20150203

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20150210

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602007034423

Country of ref document: DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20161028

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160901

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160229